As discussed in Part 2, you will design the application with a simple navigation among three screens.
正如在第2部分中所讨论的，您将使用三个界面之间的简单导航来设计应用程序。
Notice how the large amount of white space surrounding Golden rectangles creates a calm and simple atmosphere in which the navigation options can breathe and serve their purpose.
注意黄金矩形周围的空白空间要留出多大才能创造出平静而又简单的氛围，导航选项可以表示出并为这种氛围的目的服务。
You build a simple calculator application and, in subsequent iterations, improve its look and feel, modify its structure to add dependency injection, and implement JSF's navigation mechanism.
我将构建一个简单的计算器应用程序，逐步改进它的外观和感觉，修改它的结构来添加依赖性注入，以及实现JSF的导航机制。
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